rosa prepares the ingredients for pizza. she uses cheese, topping and dough in the ratio 2:3:5. rosa uses 70g of dough. work out the number of grams of cheese a

Question

rosa prepares the ingredients for pizza.

she uses cheese, topping and dough in the ratio 2:3:5.

rosa uses 70g of dough.

work out the number of grams of cheese and the number of grams of topping rosa uses.

Answer 1

The ratio of 2:3:5 means there is an integer n such that 2n:3n:5n is the actual amounts.  They have reduced like we reduce fractions to get 2:3:5.

 

The problem states that Rosa uses 70g of dough.  That is 5n=70,  so n=14.

 

The actual amounts are:    28:42:70

         28 g of cheese

         42 g of topping

         70 g of dough

Answer 2

2x + 3x + 5x = 70

10x = 70

x = 7

 

The amounts are 14, 21, and 35 gm.